Hydraulic press.



1 M. A. McKEE.

HYDRAULIC PRESS. APPLICATION FILED APR.14, 1911. v,

' Patented Apr. 28, 1914.

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jaw/Mm M. A. MGKEE.

. HYDRAULIC PRESS.

APPLICATION FILED APR.14, 1911,

Patented Apr. 28, 19-14. s $HEETS$HEET M. A. MGKEE.

HYDRAULIC PRESS.

APPLICATION FILED APR. 14, 1911.

Patented Apr. 28, 1914.

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MILTON A eme; F WESTERLY,' iiHODEhrIiAfND, "Assienon pro. Q B. sons COMPANY, on NEW YORK, N. Y., A QORPOB ATION OF NEW JERSEY."

' cation.

This invention relates to imprm ement-s in hydraulic presses and particularly to hydraulie presses need in the treatment 0t printing plates. f I v flu hydraulic presses now in use, the pl ungerof the press is either a part-of the lowerplaten or is at all times in contact therewith whereby the heat of the platen is. read- 'ily transferred to the plunger, causing badresults due to the high temperatures t0 which the platen mustbe heated and 'preventing an "eten heating of both the lower" and upper platen.

My im'entio11.eo11sists in certain improvements in the construction, form and arrangement of certain parts of: the press, whereby the platens may be heated to the re quired degree while in contact with each other and separated from the plunger and also the top of the yoke to insure the double object of a uniform heatin'gtof the platens by their surface contact with each other and also a minimum transfer of heat to the other parts of the press, especiallyf'the plunger and the top of the. yoke, the platens being 5 brought into contact with the plilnger and the top or the yoke only at the time of the pressing-operation. l

A-practieal embodiment of this inventionis 'represented'in the accompanying drawings, which illustrate the invention applied to a hydraulic press of well known and 2111- proved construction;

Figure 1. 15 a V1CW 0f the partsin'front eleyatiomthe platens-being shown separated,

for receiving a printing plate between them, the platens also being shown separated from the plunger and the top of the yoke. Fig. 2

i a partial front view'of thepress, showing the position of the parts when the platens are being heatedprelh'ninary to the pressing operation, the platens being shown held in contact with ear-h other andeeparatcd fron'i both th plungz' er .and the top of the yoke. i-

Fig 3 a top plan viewof the press. Fig. 4.- is a partial \iew in side elevation with the partsin the -ntion illustrated in Fig. 1.

- p l mw new Patented A 1-.'28,. 1i 14if Application filed April 14, v 1 7 4 I 191i. ;.-s'i51' meme;-

showing the means for-supporting the: lower being inthe position for 'snpporting the platen mats lower position, and Fig-Cristi press which will bef'nce nectiiig standard-1' 5.

1 The-upper platen.

' lower platen by llhe' loi'verplaten 7- is provided with the usual": table Sinte'rpQSed F 5 a detail section on a larger scale" platen in either itsr lowered or raised-posr- I lionindependent of the plunger; the parts plan' -rie w' of the jsa'1ne,-i theparts -heing shown intull linesin the position for-eup supporting thelplatenyinj its raised position, a 1 I will:onlyvdescrihe'tho e part8 of t lef 1-.

for al'elear. un derstanding of f tliet-cn'istruvtion;; i. arra-n e-;'

between it andi the lplunger whieh' -table' depending from the top 3 of the yoke-along; 3

has a forward; extension 9. The upp'e'r the opposite-asidesof the upper platen 6,-

lower platen wlienits'lnain supporting leices,' to be immediately described,are: e'-'- said bracketshxtbndihgi dmvnwardly along the sides of the lower platen? also.-

platens and theirh'rackets" are 's1 l the u pper platen. will be; norinal-ly' sat-{ported} a short distance away from the-top o't the below the upper: platen and mayhe moved upwardly by theplunger 1 into contact with the upper platen;

.The device, which I- have providedi'for holding the lower-platen in a posit-ion sepzi-g rated from the upper-platen andralso fromconnections, between the upper: an :l ewer 1 that the Iunger when the plunger-is loweredran'd the upper platen when the plunger is lowered, is constructed, arranged and opertn-lil ing the lower platen inengagement atcd as follows: Two-front fixed poets 15,114

' limit the downward movement-of thelow 24 26, by a connecting rod 28. The rod 27 'lower platen? willbeheld in'contact with platens being separated from the plunger isstill separated from the top 3 0 the device, the plunger 1 is first raised liftfrom the table 39nd normally rest upon the; bottom 4: of the yoke. These posts serve-Itoplaten 7 away from theupper platen 6 an support the said lower platen as the plunger 1 continues its downward movement. Two front 'osts 19, 20, and two rear posts 21,- 22, depen irom their respective levers 23, 24, 25, 26, pivoted to the fixed posts'15, 16, '17, 18. These posts 19., 20,- 21, 22, are longer than the posts 15, 16, 17, 18, and are,con-.

is accomplished by connecting the lev'ers 23, 25, by at'connecting rod 27, and the levers.

is so connected to the levers 23 and 25 that their posts 19 and 21 respectively are simultaneously moved in opposite directions into and out of position r'and the rod -28 is similarly so connected to the levers 24 and 26 that their posts '20 and 2%,respectively .are simultaneously moved in opposite direc-- tions into and out of position. .When the posts 19, 20,21, 22, are' moved into position to rest upon the bottom 4. of the yoke, the

the. upper platen 6, while the up er platen i the yoke. A common manually controlled means for swinging the posts 19,- 20, 21 22, into their operative position is rov1ded,which means comprises an inward y and outwardlvshd-iing rod29 provided with a handl''30 at its outer end and connectedat its inner end to the rods 27, 28, by diagonal bars 31, 32. The posts 19, 20, 21, 22, arenormally held out of their operative position by means of a spring 33 interposed between the handle 30 and an abutment 34 on the extension 9. of the table 8 tending to move the handle outwardly to the limit of its movement in that direction. y

The upper and lower platens are heated by any suitable means such, for instance, as banks of gas burners-35,36, leading to a suitable source of fuel supply. I j.

Proceeding to describe the operation-"of.

ing the lower, platen into [contactiwith the. upper platen. The posts 19, 20,- 21, '22, are then moved into engagement withthe bottom 4: of the yoke for supporting the-lower platen in its engagement with theupper platen, The plunger v1 may then' be returned. to its normal position. The two platens are then heated to the desired temperature, the surface contact between the platens serving to insure a more uniform heating of the two, and because of the and thegtop .of the yoke, a minimum amount of heat is transferred ,-from. the platens to the said parts; and the platens have been heated to the desired temperature,' the plunger'l is again raised and as it takes theload of the lowerjplaten from the posts 19, 20, 21, 22, .which formthe temporary support =-therefor,; these posts will be automatically 'moved out of their operative position by the spring 33. The plunger is then lowered permitting the lower platen to separate from-the upperplaten, a suflicient distance to permit the insertion of the plate between the two platens. The. lunger isthen again raised firstforcing the lower platen upwardly toward the upper platen and finally. raising both of the latens up until the up per'plate'n engages the top of the yoke, when the pressing operation is completed. The plunger. is then again lowered first permitting both platens to movedownwardly a short distance together and then the lower platen to move a short distance downwardly awayfrom the upper-platento permit the removal'of the plate. The cycle of opera tions may then be repeated.

while'l h vs" described my invention in---' connection with a hydraulic press, it"isto' be understood that it is'appulcableto any power press. Furthermoreyw e I havedescribed' theoperation ofthe device in connection with a printing plate, it is to be understood that I do not hmit the invention to such use but-contemplate its HS in connection with any work to which it is applicable. It is also evident that various changes might be resorted to in-the construction, form and arrangement of theseveral parts without de- 10( partingfrom the spirit and scope of my in. vention; hence I do not wish to limit myself strictly. to the structure herein set'forth, but

WhatI claim is 1. In a power press, a yoke,- aplunger, up- 1o: per and lower latens interposed between the 1 top of the yo e Ind the plunger, heating means for the pla ens and means for nor mally holding the lower platen separated from the plunger. i

2. In a power press, a yoke,'a plunger, upper and lower latens interposed between the top of the yo :e' and'the plunger, heating lll -means for the platens and means for normall' holdin' then per laten se arated 11. from the top if the ygke. p p 3. Inga power press, a yoke, a plunger, upper and'lower latens interposedbetween the top of the o e and the plunger, heating means for tie platens, and means for mor 121 mally holding the lower platen separated from the plunger and-upper platen separated from the top of the yoke. 4. In a power press,-a yoke, a plunger, up-

per and lower latens interposed between the 12. top of the yo e and the plunger, heating means for platens'and means for normally holding the platens separated from each other and from the plunger and 10p of the- 1 I l i I l device independent of the plunger for holding the platens together.

6.. In a power press,.a plunger, upper and lower" platens, heating means therefor-,means for normally holding the platens separated from each other and from the plunger, and

v a manually operated device independent of the plunger for holding the platenstogether.

7. In a power press, a plunger, upper and lower platens, heating means therefor and means for holding the platens together and separated from the plunger.

8. In a powerpress, a plunger, a yoke, upper and lower platens, heating means therefor and means for holding the platens together and separated from the plunger, and the top of the yoke.

- 9. In a power press, a plunger, upper and lower platens, 'a stationary support for the lower platen arranged to hold it in a position separated from the upper platen and from the plunger and a manually operated movable support rranged to be brought into position to hold the lower platen in contact with the upper platen.

da-y of April 1911.

10. In a power press, a plunger, upper and lower platens, a stationary support for the lower platen arranged to hold it in a position separated from theupper platen and from the plunger, a manually operated movable support arranged. to be brought into position to hold the lower platen in contact with the upper platen, and means for automatically throwing the movable support out of its operative posit-ion.

11. In a power press, a plunger, upper and lower platens, a stationary support for the lower platen arranged to hold it in a positionseparated from'the upper platen and from the plunger, a manually operated movable support arranged to be brought intov position to hold the lower platen in contact with the upper platen, and means for auto-' mat-ioally throwing the movable support out of its operative position'when the plunger takes the load all? of said movable support.

In testimony, that I claim the foregoing as my invention, I have signed my name in presence of two witnesses, this thirteenth MILTON A. MoKEE. Witnesses F. Grouse BARRY,

IIENRY C. THIEME. 

